mmn125 snapshot

[linh-nguyenbao]

resolve ticket #125, #118 and #137 too
docs

snapshot json data

{
  "meta": {
    "slot": 300,
    "bank_hash": [
      201,
      232,
      217,
      174,
      59,
      69,
      223,
      67,
      95,
      88,
      12,
      95,
      190,
      10,
      86,
      34,
      149,
      222,
      158,
      17,
      68,
      182,
      93,
      218,
      72,
      14,
      27,
      100,
      37,
      232,
      155,
      62
    ],
   ...
  },
  "accounts": [
    {
      "Address": "026c47f8ddd68ed2a1d2345cbbf34ad9e7173c53c259bba17483d77b95b33c1d",
      "Balance": 1000,
      "Nonce": 0,
      "History": [
        "a543d5e48227f27883f650dce7061ebc9bbfb6d628dd301f2642aa31e76b10fb"
      ]
    },
     ...
    {
      "Address": "0fd762871d55c1548c25d481068613dfbefdf63b813295725d9c22bf83f02b1a",
      "Balance": 250,
      "Nonce": 0,
      "History": [
        "836b3ac7edb80829dbef66f9ad6a0e530b6c6df582c761ca68376d83bf1f0753",
         ....
        "841876275014c6a44cda2d80264f24fd80209235599ec165dfd6637403c515c4"
      ]
    },
    {
      "Address": "123ac41d36e59409608d739ba68c738a312ce0096553775f3e7d037290c47df5",
      "Balance": 200,
      "Nonce": 1,
      "History": [
        "6b08d86830ac68c46ae5195b03a31c96ad83b3f52e0f4b940d7ced1dc332b22a",
        "6825c66014fac087131c0809fb78a290854da7e5b827fd2756fa4df8e5d51b73"
      ]
    },
...,
    {
      "Address": "fa648d3bee29a1dd16c2ca85f104dc09e39f55777a57f11bcc202c28c8212e4a",
      "Balance": 200,
      "Nonce": 0,
      "History": [
        "1e39b75d25d7bc1ad7eae827d7573e3fd3898599cc50175f200b5f9d9f1cca07"
      ]
    }
  ]
}